Dynamical localization in two- and three-dimensional tight-binding systems under electric fields

Journal Article · Sat Mar 01 00:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.6661· OSTI ID:477029

Nazareno, H N; Lepine, Y ^[1]

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1. Departement de Physique et Groupe de Recherche en Physique et Technologie des Couches Minces, Universite de Montreal, Case Postale 6128, Succursale Centre-ville, Montreal, Quebec, Canada, H3C 3J7 (CANADA)

The problem of dynamical localization in two- and three-dimensional tight-binding systems under the action of electric fields is investigated. In the two-dimensional (2D) case we have also included the presence of one and two impurities in an otherwise perfect crystal. The corresponding Hamiltonian is solved exactly for finite 2D lattices. The interplay between field and impurities on localization of wave packets is analyzed. Our results show that the electric-field orientation is crucial to the confinement of the wave function. We also conclude that the field influence on localization is much stronger than that of the disorder. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 477029
• Journal Information: Physical Review, B: Condensed Matter, Vol. 55, Issue 11; Other Information: PBD: Mar 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRYSTAL LATTICES
WAVE FUNCTIONS
ELECTRIC FIELDS
IMPURITIES
WAVE PACKETS
LOCALITY
WAVE PROPAGATION
TIME DEPENDENCE
TWO-DIMENSIONAL CALCULATIONS
THREE-DIMENSIONAL CALCULATIONS